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Some Twitter videos/gifs don't play, YouTube works fine

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Odd thing here, some (not all) videos on Twitter don't play. I get the first frame with the blue play button, but when I click it, it goes black with no sound. Some videos work, particularly the longer ones. Animated GIFS do not work.

I have tried nearly everything I found on the internet: new profile, clearing cookies/cache, changing about:config settings, using safe mode: nothing worked. Chrome does not play also, but it does not show a black screen, it freezes in the first frame (i.e, the blue play button simply vanishes).

I also have tried to access the video URL directly, it also does not play. But if I download the video and play it locally with VLC, it DOES play. Funny thing, this.

Example tweet: https://twitter.com/cmerigo/status/1147114264429322240

I am currently suspecting that it's a codec problem in the browsers. I went to html5test.com, it says that my Firefox does not support MPEG-4 ASP and H.265. But in the YouTube HTML5 page (https://www.youtube.com/html5) all checkboxes are marked.

So, I'm out of ideas. Please help.

Odd thing here, some (not all) videos on Twitter don't play. I get the first frame with the blue play button, but when I click it, it goes black with no sound. Some videos work, particularly the longer ones. Animated GIFS do not work. I have tried nearly everything I found on the internet: new profile, clearing cookies/cache, changing about:config settings, using safe mode: nothing worked. Chrome does not play also, but it does not show a black screen, it freezes in the first frame (i.e, the blue play button simply vanishes). I also have tried to access the video URL directly, it also does not play. But if I download the video and play it locally with VLC, it DOES play. Funny thing, this. Example tweet: https://twitter.com/cmerigo/status/1147114264429322240 I am currently suspecting that it's a codec problem in the browsers. I went to html5test.com, it says that my Firefox does not support MPEG-4 ASP and H.265. But in the YouTube HTML5 page (https://www.youtube.com/html5) all checkboxes are marked. So, I'm out of ideas. Please help.
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Aanvullende systeemdetails

Geïnstalleerde plug-ins

  • Shockwave Flash 32.0 r0

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  • Useragent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0

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SE-Tundra 1 oplossingen 4 antwoorden

I have the exact same problem, and a new that started just a few days ago. First, most embedded videos animated gifs play OK for me in Twitter; but increasing numbers of them do not. In all cases, the videos will play in Chrome (for which I am not logged in on Twitter). I can't find any settings in my twitter account that might affect this, so I think there is a FireFox setting that I need to fix.

The new problem is shown below. The video button is "X-ed" out, whereas in the other problem (as stated by the OP) and initial frame of the video is visible and the there is an actual start button.

The two problems may be related.

I have the exact same problem, and a new that started just a few days ago. First, most embedded videos animated gifs play OK for me in Twitter; but increasing numbers of them do not. In all cases, the videos will play in Chrome (for which I am not logged in on Twitter). I can't find any settings in my twitter account that might affect this, so I think there is a FireFox setting that I need to fix. The new problem is shown below. The video button is "X-ed" out, whereas in the other problem (as stated by the OP) and initial frame of the video is visible and the there is an actual start button. The two problems may be related.
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cor-el
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You can check the Web Console for media related messages.

You can check the Web Console for media related messages. *"3-bar" menu button or Tools -> Web Developer *https://developer.mozilla.org/en-US/Tools/Web_Console
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I'm sorry guys, I'm still having this problem. In my case, they do not work in Chrome either, and that's why I suspect that the problem might not be browser related. Anyways.

I also would like to add that Vimeo videos do not play either. The player shows up, with controllers, but when I click play, it loads the video (I can see the data coming through in the "network" tab of the developer tools) but does not start. The throbber (loading animation) shows but does not go away. [edit: Vimeo videos *do* play if I go through their site, if it's embedded then they behave as described above]

No solutions at all? If I need to provide information about my build I'll be glad to do it.

I'm sorry guys, I'm still having this problem. In my case, they do not work in Chrome either, and that's why I suspect that the problem might not be browser related. Anyways. I also would like to add that Vimeo videos do not play either. The player shows up, with controllers, but when I click play, it loads the video (I can see the data coming through in the "network" tab of the developer tools) but does not start. The throbber (loading animation) shows but does not go away. [edit: Vimeo videos *do* play if I go through their site, if it's embedded then they behave as described above] No solutions at all? If I need to provide information about my build I'll be glad to do it.

Bewerkt door candian2016 op

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cor-el
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What does the Web Console show? If you lack support for playing media files on your computer then this could be a possible cause. If it doesn't work in other browsers as well then you may have a problem with security software. Google Chrome usually comes with its own builtin support and doesn't rely on native OS support like Firefox.

What does the Web Console show? If you lack support for playing media files on your computer then this could be a possible cause. If it doesn't work in other browsers as well then you may have a problem with security software. Google Chrome usually comes with its own builtin support and doesn't rely on native OS support like Firefox.
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cor-el said

What does the Web Console show?

Nothing relevant. No errors at all, related to the video. I even set the level of the console to debug, couldn't find any message there.

If you lack support for playing media files on your computer then this could be a possible cause. If it doesn't work in other browsers as well then you may have a problem with security software. Google Chrome usually comes with its own builtin support and doesn't rely on native OS support like Firefox.

No, it's the browser. If I download the video and use an external player (I use VLC) the video DOES play. The problem is with the browser itself. Chrome does not play either.

Vimeo videos load the placeholder image and all controls, normally. When I click play, it loads the first segments of the videos (I can see this in the console) but does not play. It shows the throbber and stays there.

''cor-el [[#answer-1240269|said]]'' <blockquote> What does the Web Console show? </blockquote> Nothing relevant. No errors at all, related to the video. I even set the level of the console to debug, couldn't find any message there. <blockquote> If you lack support for playing media files on your computer then this could be a possible cause. If it doesn't work in other browsers as well then you may have a problem with security software. Google Chrome usually comes with its own builtin support and doesn't rely on native OS support like Firefox. </blockquote> No, it's the browser. If I download the video and use an external player (I use VLC) the video DOES play. The problem is with the browser itself. Chrome does not play either. Vimeo videos load the placeholder image and all controls, normally. When I click play, it loads the first segments of the videos (I can see this in the console) but does not play. It shows the throbber and stays there.
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cor-el
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Does the Network Monitor show a request to download the video?

Does the Network Monitor show a request to download the video? *https://developer.mozilla.org/en-US/Tools/Network_Monitor
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cor-el said

Does the Network Monitor show a request to download the video?

Yes. When I click play, it makes three requests to the server. Vimeo loads "segments" of the video, it seems that they're the first segments.

I've attached an example image. It stucks in this "loading" state eternally.

[edit] Just tested in Opera. Fresh new installation, downloaded, installed, first page opened was the one from screenshot attached. Same behavior: it loads, but does not start playing. As of right now I am almost convinced that it's a problem outside Firefox.

''cor-el [[#answer-1240758|said]]'' <blockquote> Does the Network Monitor show a request to download the video? </blockquote> Yes. When I click play, it makes three requests to the server. Vimeo loads "segments" of the video, it seems that they're the first segments. I've attached an example image. It stucks in this "loading" state eternally. [edit] Just tested in Opera. Fresh new installation, downloaded, installed, first page opened was the one from screenshot attached. Same behavior: it loads, but does not start playing. As of right now I am almost convinced that it's a problem outside Firefox.

Bewerkt door candian2016 op

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